[PATCH 1/1] nvme: use macro definitions for setting reservation values

[Max Gurtovoy]

This makes the code more readable.

Signed-off-by: Max Gurtovoy <mgurtovoy at nvidia.com>
---
 drivers/nvme/host/core.c | 12 ++++++------
 include/linux/nvme.h     | 12 ++++++++++++
 2 files changed, 18 insertions(+), 6 deletions(-)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 3f1a7dc2a2a3..50668e1bd9f1 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -2068,17 +2068,17 @@ static char nvme_pr_type(enum pr_type type)
 {
 	switch (type) {
 	case PR_WRITE_EXCLUSIVE:
-		return 1;
+		return NVME_PR_WRITE_EXCLUSIVE;
 	case PR_EXCLUSIVE_ACCESS:
-		return 2;
+		return NVME_PR_EXCLUSIVE_ACCESS;
 	case PR_WRITE_EXCLUSIVE_REG_ONLY:
-		return 3;
+		return NVME_PR_WRITE_EXCLUSIVE_REG_ONLY;
 	case PR_EXCLUSIVE_ACCESS_REG_ONLY:
-		return 4;
+		return NVME_PR_EXCLUSIVE_ACCESS_REG_ONLY;
 	case PR_WRITE_EXCLUSIVE_ALL_REGS:
-		return 5;
+		return NVME_PR_WRITE_EXCLUSIVE_ALL_REGS;
 	case PR_EXCLUSIVE_ACCESS_ALL_REGS:
-		return 6;
+		return NVME_PR_EXCLUSIVE_ACCESS_ALL_REGS;
 	default:
 		return 0;
 	}
diff --git a/include/linux/nvme.h b/include/linux/nvme.h
index ae53d74f3696..a925be0056f2 100644
--- a/include/linux/nvme.h
+++ b/include/linux/nvme.h
@@ -238,6 +238,18 @@ enum {
 	NVME_CAP_CRMS_CRIMS	= 1ULL << 60,
 };
 
+/*
+ * Reservation Type Encoding
+ */
+enum {
+	NVME_PR_WRITE_EXCLUSIVE = 1, /* Write Exclusive Reservation */
+	NVME_PR_EXCLUSIVE_ACCESS = 2, /* Exclusive Access Reservation */
+	NVME_PR_WRITE_EXCLUSIVE_REG_ONLY = 3, /* Write Exclusive - Registrants Only Reservation */
+	NVME_PR_EXCLUSIVE_ACCESS_REG_ONLY = 4, /* Exclusive Access - Registrants Only Reservation */
+	NVME_PR_WRITE_EXCLUSIVE_ALL_REGS = 5, /* Write Exclusive - All Registrants Reservation */
+	NVME_PR_EXCLUSIVE_ACCESS_ALL_REGS = 6, /* Exclusive Access - All Registrants Reservation */
+};
+
 struct nvme_id_power_state {
 	__le16			max_power;	/* centiwatts */
 	__u8			rsvd2;
-- 
2.18.1